<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>while检查账号密码</title>
    <script>
        var user = prompt('请输入账号：')
        var pwd = prompt('请输入密码：')
        while (user != 'admin' || pwd != '123456') {
            var user = prompt('请输入账号：')
            var pwd = prompt('请输入密码：')
        }
        alert('登录成功！')
    </script>
</head>

<body>

</body>

</html>